# A response function approach for rapid far-field tsunami forecasting

## TL;DR

This paper introduces a rapid tsunami forecasting method using real-time measurements and pre-computed response functions, enabling quick and accurate predictions of tsunami impacts at distant coasts.

## Contribution

It presents a novel response function approach that allows instant tsunami predictions from open ocean measurements, improving speed and accuracy over traditional models.

## Key findings

- High accuracy in hindcasting the 2010 Chilean tsunami
- Effective application to the 2011 Tohoku-Oki tsunami
- Validated for trans-Pacific tsunami forecasting

## Abstract

Predicting tsunami impacts at remote coasts largely relies on tsunami en-route measurements in an open ocean. In this work, these measurements are used to generate instant tsunami predictions in deep water and near the coast. The predictions are generated as a response or a combination of responses to one or more tsunameters, with each response obtained as a convolution of real-time tsunameter measurements and a pre-computed Pulse Response Function (PRF). Practical implementation of this method requires tables of PRFs in a 3D parameter space: earthquake location - tsunameter - forecasted site. Examples of hindcasting the 2010 Chilean and the 2011 Tohoku-Oki tsunamis along the US West Coast and beyond demonstrated high accuracy of the suggested technology in application to trans-Pacific seismically-generated tsunamis.